The Largest Geothermal Power Plants in the US

PlantCity/CountyStatePrimary Fuel TypeMWh GeneratedCO2 EmissionsRank EmissionsCO2 Emissions/MWhRant Emissions/MWhClosing Date
Ormesa IOrmat Nevada Inc (100.00%)
Imperial County CA Geothermal98,652MWh11
BradyBrady Power Partners (100.00%)
Churchill County NV Geothermal97,082MWh11
Puna Geothermal Venture IPuna Geothermal Venture (100.00%)
Hawaii County HI Geothermal9,640MWh11
Salton Sea Power Gen Co - Unit 2MidAmerican Energy (100.00%)
Imperial County CA Geothermal95,482MWh11
Desert Peak Power PlantORNI 3 LLC (100.00%)
Churchill County NV Geothermal94,365MWh11
Ormesa IIOrmat Nevada Inc (100.00%)
Imperial County CA Geothermal92,218MWh11
Raft River Geothermal Power PlantRaft River Energy 1 LLC (100.00%)
Cassia County ID Geothermal90,572MWh11
San EmidioUSG Nevada LLC (100.00%)
Washoe County NV Geothermal88,915MWh11
North Brawley Geothermal PlantOrmat Nevada Inc (100.00%)
Imperial County CA Geothermal83,639MWh11
Mammoth G2Mammoth Pacific LP (100.00%)
Mono County CA Geothermal74,945MWh11
McGinness HillsOrmat Nevada Inc (100.00%)
Lander County NV Geothermal719,369MWh11
Salton Sea Power Gen Co Unit 1MidAmerican Energy (100.00%)
Imperial County CA Geothermal70,469MWh11
Jersey Valley Geothermal Power PlantOrmat Nevada Inc (100.00%)
Pershing County NV Geothermal66,520MWh11
Ormesa IIIOrmat Nevada Inc (100.00%)
Imperial County CA Geothermal66,483MWh11
Imperial County CA Geothermal64,658MWh11
Thermo No 1Thermo No 1 BE 01 LLC (100.00%)
Beaver County UT Geothermal61,393MWh11
Mammoth G1Mammoth Pacific LP (100.00%)
Mono County CA Geothermal58,465MWh11
Steamboat IIISteamboat Development Corp (100.00%)
Reno NV Geothermal57,246MWh11
Lightning Dock Geothermal HI-01, LLCLightning Dock Geothermal HI-01, LLC (100.00%)
Cotton City CDP NM Geothermal50,934MWh11
McGinness Hills 3Ormat Nevada Inc (100.00%)
Lander County NV Geothermal501,703MWh11
Steamboat IISteamboat Development Corp (100.00%)
Reno NV Geothermal49,277MWh11
Terra-Gen Dixie ValleyEnergy Capital Partners (100.00%)
Churchill County NV Geothermal490,136MWh11
Sonoma County CA Geothermal481,441MWh11
Geysers Unit 5-20Calpine (100.00%)
Sonoma County CA Geothermal4,580,405MWh11
Coso Finance PartnersCoso Operating Co LLC (100.00%)
Inyo County CA Geothermal454,163MWh11
Calistoga Power PlantCalpine (100.00%)
Lake County CA Geothermal432,941MWh11
Sonoma California GeothermalCalpine (100.00%)
Sonoma County CA Geothermal428,129MWh11
ENEL Salt Wells LLCEnel Green Power (100.00%)
Churchill County NV Geothermal39,372MWh11
John L. Featherstone PlantHudson Ranch Power I LLC (100.00%)
Imperial County CA Geothermal375,735MWh11
Coso Power DevelopersCoso Operating Co LLC (100.00%)
Inyo County CA Geothermal364,493MWh11
Imperial County CA Geothermal340,628MWh11
Imperial County CA Geothermal336,572MWh11
Heber GeothermalOrmat Nevada Inc (100.00%)
Imperial County CA Geothermal332,767MWh11
Salton Sea Power Gen Co - Unit 3MidAmerican Energy (100.00%)
Imperial County CA Geothermal330,137MWh11
Imperial County CA Geothermal327,695MWh11
Galena 2 Geothermal Power PlantOrmat Nevada Inc (100.00%)
Washoe County NV Geothermal32,091MWh11
Sonoma County CA Geothermal314,765MWh11
Salton Sea Power LLC - Unit 5MidAmerican Energy (100.00%)
Imperial County CA Geothermal285,039MWh11
Coso Energy DevelopersCoso Operating Co LLC (100.00%)
Inyo County CA Geothermal267,393MWh11
Vulcan-BN Geothermal Power CompanyMidAmerican Energy (100.00%)
Imperial County CA Geothermal260,347MWh11
Last Reviewed By: Matt Hope
Published: 2021-06-02Last Updated: 2022-03-09